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Precipitation of second group sulphides in qualitative analysis is carried out with `H_(2)S` in presence of `HCl` and nitric acid.Why?

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Precipitation of second group sulphides in qualitative analysis is carried out with `H_(2)S` in presence of `HCl` and nitric acid.Why?
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`HNO_(3)` a strong oxidant, will oxidise `H_(2)S` to give colloidal sulphur.Thus precipitation of `II` gp. Sulphide will not occur.
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